I had my iliostomy in March 2018. Since then I have not been able to wear my pants fully closed and needed suspenders to keep them up and a long shirt to cover my bag and provide sufficient modesty. I also needd to constantly wear a teeshirt to keep the suspenders off of my shoulders. My stoma is right at my waist and a belt would go right across it. Since my iliostomy is so active, I can not keep it tightly confined.
Yesterday I went looking for "hiphuggers" pants that would fasten below my flange. I found a pair of LEVIS 502 REGULAR TAPER at Kohl's department store. They are designed to ride low on the hips. These, so far, seem to be the solution. I normally wear 38 - 32 but becanse they are worn low, fit great at 36-30. They are pricey at $69.50 but were on sale for $41 yesterday.
I will post an update if my enthusiasm for these pants changes later. I expect there are other men who would benefit from these.